In 1978, NASA changed the organization of the astronauts 20 mission specialists and 15 new pilot astronauts were chosen.
Which correctly shows where a semicolon is needed in the sentence?

i think the answer would be c. phrase by phrase.

hope this

in night, why are wiesel and his father evacuated from the auschwitz concentration camp? a massive escape makes the nazis question the security of auschwitz. they are assigned to work as laborers in a factory at another camp, buna. hitler has ordered that all remaining jews be relocated within german borders. the german army needs the camp guards to go to the battle front for a last-chance defense.

the switch in narration increases the proximity of the narrator to the main character and the reader can perceive information only through the filter of a single character.